1) The world's largest volcano, Mauna Loa in Hawaii, is also one of the most active.

2) Honey never spoils. Archaeologists have found pots of honey in ancient Egyptian tombs that are over 3,000 years old and still perfectly edible.

3) The concept of self-driving cars, or autonomous vehicles, is being actively developed by companies such as Tesla, Google (Waymo), and Uber.

4) The world's first stock exchange was established in Amsterdam in 1602.